Comparison of catalytic performance of different types of graphene in Li-O2 batteries

Jung Eun Park, Gwang Hee Lee, Mingu Choi, Mushtaq Ahmad Dar, Hyun Woo Shim, Dong Wan Kim

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)

    Abstract

    We report comparative catalytic studies of two types of commercial graphene nanoplatelets as electrode materials with different physical properties for Li-O2 batteries. The graphene nanoplatelets were characterized by field-emission scanning electron microscopy, transmission electron microscopy, N2 physisorption, X-ray photoelectron spectroscopy, and Raman spectroscopy. The electrochemical performance of the graphene nanoplatelets, which have large pore volume density, large pore diameter, and high population of defect sites, was evaluated using galvanostatic discharge-charge cycling and a depth-of-discharge test. Higher specific capacity of the Li-O2 battery was achieved when graphene nanoplatelets were used as an electrode material; this specific capacity could be associated with pore volume density, pore diameter, and number of defects in the graphene nanoplatelets.

    Original languageEnglish
    Pages (from-to)231-237
    Number of pages7
    JournalJournal of Alloys and Compounds
    Volume647
    DOIs
    Publication statusPublished - 2015 Jul 1

    Bibliographical note

    Funding Information:
    This research was performed as a cooperation project supported by the Korea Research Institute of Chemical Technology . This research was also supported by the Korea Small and Medium Business Administration ( S2230272 ) and by the R&D Center for Valuable Recycling (Global-Top R&BD Program) of the Ministry of Environment ( 2014001170002 ).

    Keywords

    • Catalytic performance
    • Electrochemical performance
    • Graphene
    • Li-O batteries
    • Pore volume

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Mechanical Engineering
    • Metals and Alloys
    • Materials Chemistry

    Fingerprint

    Dive into the research topics of 'Comparison of catalytic performance of different types of graphene in Li-O2 batteries'. Together they form a unique fingerprint.

    Cite this